<template>
  <div class="login">
    <vue-particles id="tsparticles" :particlesInit="particlesInit" :particlesLoaded="particlesLoaded"
      :options="particles" />
    <div style="z-index: 99;">
      <el-form ref="loginRef" :model="loginForm" :rules="loginRules" class="login-form">
        <h3 class="title">运戳屌酱</h3>
        <el-form-item prop="username">
          <el-input v-model="loginForm.username" type="text" size="large" auto-complete="off" placeholder="账号">
            <template #prefix><svg-icon icon-class="user" class="el-input__icon input-icon" /></template>
          </el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input v-model="loginForm.password" type="password" size="large" auto-complete="off" placeholder="密码"
            @keyup.enter="handleLogin">
            <template #prefix><svg-icon icon-class="password" class="el-input__icon input-icon" /></template>
          </el-input>
        </el-form-item>
        <el-form-item prop="code" v-if="captchaEnabled">
          <el-input v-model="loginForm.code" size="large" auto-complete="off" placeholder="验证码" style="width: 63%"
            @keyup.enter="handleLogin">
            <template #prefix><svg-icon icon-class="validCode" class="el-input__icon input-icon" /></template>
          </el-input>
          <div class="login-code">
            <img :src="codeUrl" @click="getCode" class="login-code-img" />
          </div>
        </el-form-item>
        <el-checkbox v-model="loginForm.rememberMe" style="margin:0px 0px 25px 0px;">记住密码</el-checkbox>
        <el-form-item style="width:100%;">
          <el-button :loading="loading" size="large" type="primary" style="width:100%;" @click.prevent="handleLogin">
            <span v-if="!loading">登 录</span>
            <span v-else>登 录 中...</span>
          </el-button>
          <div style="float: right;" v-if="register">
            <router-link class="link-type" :to="'/register'">立即注册</router-link>
          </div>
        </el-form-item>
      </el-form>
    </div>
    <!--  底部  -->
    <div class="el-login-footer">
      <!-- <span>Copyright © 2023 </span> -->
    </div>
  </div>
</template>

<script setup>
  import { getCodeImg } from "@/api/login"
  import Cookies from "js-cookie"
  import { encrypt, decrypt } from "@/utils/jsencrypt"
  import useUserStore from '@/store/modules/user'
  import { loadSlim } from "tsparticles-slim"

  // 粒子配置
  const particles = {
    fpsLimit: 60,
    interactivity: {
      detectsOn: 'canvas',
      events: {
        onClick: { // 开启鼠标点击的效果
          enable: false,
          mode: 'repulse'
        },
        onHover: { // 开启鼠标悬浮的效果(线条跟着鼠标移动)
          enable: true,
          mode: 'grab'
        },
        resize: true
      },
      modes: { // 配置动画效果
        bubble: {
          distance: 400,
          duration: 2,
          opacity: 0.8,
          size: 40
        },
        push: {
          quantity: 0
        },
        grab: {
          distance: 200,
          duration: 0.4
        },
        attract: { // 鼠标悬浮时，集中于一点，鼠标移开时释放产生涟漪效果
          distance: 200,
          duration: 0.4,
          factor: 1
        }
      }
    },
    particles: {
      color: {
        value: '#dedede' // 粒子点的颜色
      },
      links: {
        color: '#FFFFFF', // 线条颜色
        distance: 150,
        enable: true,
        opacity: 0.4, // 不透明度
        width: 1   // 线条宽度
      },
      collisions: {
        enable: true
      },
      move: {
        attract: { enable: false, rotateX: 600, rotateY: 1200 },
        bounce: false,
        direction: 'none',
        enable: true,
        out_mode: 'out',
        random: false,
        speed: 1, // 移动速度
        straight: false
      },
      number: {
        density: {
          enable: true,
          value_area: 800
        },
        value: 100
      },
      opacity: {
        value: 0.4
      },
      shape: {
        type: 'star'
      },
      size: {
        random: true,
        value: 0.1
      }
    },
    detectRetina: true
  }
  // 粒子初始化
  const particlesInit = async engine => {
    //await loadFull(engine);
    await loadSlim(engine)
  }
  // 粒子装载
  const particlesLoaded = async container => {
    // console.log("Particles container loaded", container)
  }
  const userStore = useUserStore()
  const router = useRouter()
  const { proxy } = getCurrentInstance()

  const loginForm = ref({
    username: "", // admin
    password: "", // admin123
    rememberMe: false,
    code: "",
    uuid: ""
  })

  const loginRules = {
    username: [{ required: true, trigger: "blur", message: "请输入您的账号" }],
    password: [{ required: true, trigger: "blur", message: "请输入您的密码" }],
    code: [{ required: true, trigger: "change", message: "请输入验证码" }]
  }

  const codeUrl = ref("")
  const loading = ref(false)
  // 验证码开关
  const captchaEnabled = ref(true)
  // 注册开关
  const register = ref(false)
  const redirect = ref(undefined)

  function handleLogin() {
    proxy.$refs.loginRef.validate(valid => {
      if (valid) {
        loading.value = true
        // 勾选了需要记住密码设置在 cookie 中设置记住用户名和密码
        if (loginForm.value.rememberMe) {
          Cookies.set("username", loginForm.value.username, { expires: 30 })
          Cookies.set("password", encrypt(loginForm.value.password), { expires: 30 })
          Cookies.set("rememberMe", loginForm.value.rememberMe, { expires: 30 })
        } else {
          // 否则移除
          Cookies.remove("username")
          Cookies.remove("password")
          Cookies.remove("rememberMe")
        }
        // 调用action的登录方法
        userStore.login(loginForm.value).then(() => {
          router.push({ path: redirect.value || "/" })
        }).catch(() => {
          loading.value = false
          // 重新获取验证码
          if (captchaEnabled.value) {
            getCode()
          }
        })
      }
    })
  }

  function getCode() {
    getCodeImg().then(res => {
      captchaEnabled.value = res.data.captchaEnabled === undefined ? true : res.data.captchaEnabled
      if (captchaEnabled.value) {
        codeUrl.value = "data:image/gif;base64," + res.data.img
        loginForm.value.uuid = res.data.uuid
      }
    })
  }

  function getCookie() {
    const username = Cookies.get("username")
    const password = Cookies.get("password")
    const rememberMe = Cookies.get("rememberMe")
    loginForm.value = {
      username: username === undefined ? loginForm.value.username : username,
      password: password === undefined ? loginForm.value.password : decrypt(password),
      rememberMe: rememberMe === undefined ? false : Boolean(rememberMe)
    }
  }

  getCode()
  getCookie();
</script>

<style lang='scss' scoped>
  .login {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
    background-image: url("../assets/images/ColorBg.jpg");
    background-size: cover;
  }

  .title {
    margin: 0px auto 30px auto;
    text-align: center;
    color: #707070;
  }

  .login-form {
    border-radius: 6px;
    background: #ffffff;
    width: 400px;
    padding: 25px 25px 5px 25px;

    .el-input {
      height: 40px;

      input {
        height: 40px;
      }
    }

    .input-icon {
      height: 39px;
      width: 14px;
      margin-left: 0px;
    }
  }

  .login-tip {
    font-size: 13px;
    text-align: center;
    color: #bfbfbf;
  }

  .login-code {
    width: 33%;
    height: 40px;
    float: right;

    img {
      cursor: pointer;
      vertical-align: middle;
    }
  }

  .el-login-footer {
    height: 40px;
    line-height: 40px;
    position: fixed;
    bottom: 0;
    width: 100%;
    text-align: center;
    color: #fff;
    font-family: Arial;
    font-size: 12px;
    letter-spacing: 1px;
  }

  .login-code-img {
    height: 40px;
    padding-left: 12px;
  }
</style>
